Deviation just means how far from the normal. Published on September 17 2020 by Pritha Bhandari. This value is the variance.
The mean of the sample mean X that we have just computed is exactly the mean of the population.
For a sample size of more than 30 the sampling distribution formula is given below. For a sample size of more than 30 the sampling distribution formula is given below. In other words the sample mean is equal to the population mean. You need to get the variable for which you want to know the mean and standard deviation into the variables box on the right as per the image above.